Viji G, Gnanamanickam S S
Senior Research Fellow.
Professor, Center for Advanced Studies in Botany, University of Madras, Madras 600 025, India.
Plant Dis. 1998 Jan;82(1):36-40. doi: 10.1094/PDIS.1998.82.1.36.
Production of perithecia, asci, and ascospores by Indian isolates of Magnaporthe grisea is rare and has not been found among the Southern Indian isolates of the blast pathogen. From among 138 monoconidial isolates that infect rice and other hosts, we now report the distribution of mating types (MAT1-1 and MAT1-2) of M. grisea in finger millet and paragrass (Brachiaria mutica)-infecting isolates. Twenty-eight of the 96 finger millet isolates, 5 of the 16 paragrass isolates, and none of the 26 rice isolates produced fertile perithecia in laboratory matings with fertile testers. Backcrosses of ascospore progenies to the parental M. grisea isolate but not to the tester strain resulted in fertile perithecial formation, and a further backcrossing scheme indicated definite fertility patterns of Mendelian inheritance in M. grisea.
印度稻瘟病菌株产生子囊壳、子囊和子囊孢子的情况很少见，在印度南部的稻瘟病菌分离株中尚未发现。在138个感染水稻和其他寄主的单孢分离株中，我们现在报告了稻瘟病菌在感染黍稷和臂形草（Brachiaria mutica）的分离株中的交配型（MAT1-1和MAT1-2）分布。在96个黍稷分离株中，有28个、16个臂形草分离株中有5个，而26个水稻分离株中没有一个在与可育测试菌株进行实验室交配时产生可育子囊壳。子囊孢子后代与亲本稻瘟病菌分离株回交，但不与测试菌株回交，导致形成可育子囊壳，进一步的回交方案表明稻瘟病菌存在明确的孟德尔遗传育性模式。
